20ps Organ Sewing Needle (Size 18 20) 16x63 2077 16x113 Tfx63 for Singer 16 Rex 26 188 + Free Gift (Green Threader) mix szie 18 20+ FREE GIFT (green threader) needle system name 16x63 2077 16x113 round Shank Designed to work in Singer commercial sewing machine models requiring the 16x63 needle system including most Singer 16, 16U, 31, 32-36, 32, 33, 44-23, 44K, 56, 61-1, 61-14, 331K5, 3861 series models and more! Rex 26 188